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		#xiaoming{
			color: red;
			font-size: 50px;
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		.user{
			color: blue;
			font-size: 50px;
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		span,i{
			color: yellow;
			font-size: 60px;
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		body #xiaoming a{
			color: green;
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		body #xiaoming a:hover{
			color: red;
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		.xiaohong{
			font-weight: 800;
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		#btn{
			font-weight: 800;
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		*{
			font-family: "宋体"
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		.a{
			font-weight: 800;
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	<p id="xiaoming">学并思 <a href="">百度</a></p>
	<p class="user xiaohong">学并思</p>
	<p class="user">学并思 <h1 class="user_title"></h1></p>
	<span class="a">学并思aaa <a href="">百度</a></span>
	<span>学并思2</span>
	<span>学并思3</span>	
	<i>学并思1</i>
	<i>学并思2</i>
	<i>学并思3</i>


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